public bool Read()
{
_reader.EnsureSpace(20);
// Check for end (after reading one thing at the root depth)
if (_reader.EndOfStream)
{
TokenType = BionToken.None;
return(false);
}
// Read the marker
byte marker = _reader.Buffer[_reader.Index++];
// Identify the token type and length
_currentMarker = (BionMarker)marker;
_currentLength = LengthLookup[marker];
TokenType = TokenLookup[marker];
if (_currentLength < 0)
{
_currentLength = LengthIncludingTerminator();
_currentDecodedString = null;
_currentCompressedStringStart = _reader.Index;
_reader.Index += _currentLength;
}
else if (_currentLength > 0)
{
// Read value (non-string) or length (string)
_currentDecodedNumber = NumberConverter.ReadSevenBitExplicit(_reader, _currentLength);
// Read value (string)
if (marker >= 0xF0)
{
_currentCompressedStringStart = -1;
_currentDecodedString = null;
_currentLength = (int)_currentDecodedNumber;
_reader.EnsureSpace(_currentLength);
_currentString = String8.Reference(_reader.Buffer, _reader.Index, _currentLength);
_reader.Index += _currentLength;
}
}
else
{
// Adjust depth (length 0 tokens only)
_currentDepth += DepthLookup[marker];
}
if (TokenType == BionToken.None)
{
throw new BionSyntaxException($"Invalid Bion Token 0x{_currentMarker:X2} @{BytesRead:n0}.");
}
return(true);
}
private void DecompressString()
{
if (_decompressReader == null)
{
_decompressReader = BufferedReader.FromArray(_reader.Buffer, 0, 0);
_decompressWriter = BufferedWriter.ToArray(new byte[1024]);
}
_decompressReader.ReadSlice(_reader.Buffer, _currentCompressedStringStart, _reader.Index - 1);
_decompressWriter.Index = 0;
// Decompress the content
_compressor.Expand(_decompressReader, _decompressWriter);
// Make a String8 referencing the full decompressed value
_currentString = String8.Reference(_decompressWriter.Buffer, 0, _decompressWriter.Index);
}
private static string SplitAndJoin(string content)
{
StringBuilder result = new StringBuilder();
byte[] buffer = new byte[content.Length];
using (BufferedReader reader = BufferedReader.FromString(content, ref buffer))
{
bool isWord = WordSplitter.IsLetterOrDigit(reader.Buffer[reader.Index]);
int length = 0;
while (!reader.EndOfStream)
{
// Read the next word
length = WordSplitter.NextWordLength(reader, isWord);
String8 word = String8.Reference(reader.Buffer, reader.Index, length);
// Set state to read next word
reader.Index += length;
isWord = !isWord;
if (reader.Index < reader.Length || reader.EndOfStream)
{
// If this is word is definitely complete, write it
if (result.Length > 0)
{
result.Append("|");
}
result.Append(word.ToString());
}
else if (!reader.EndOfStream)
{
// Reset state to re-read this word
reader.Index -= length;
isWord = !isWord;
// If end of buffer but not stream, request more
reader.EnsureSpace(length * 2);
}
}
}
return(result.ToString());
}
